Supporting multipart file upload

lib/graph.js

@@ -32,7 +32,7 @@ function extend(target) {
 var accessToken          = null
   , appSecret            = null
   , graphUrl             = 'https://graph.facebook.com'
-  , graphVersion         = '2.9' // default to the oldest version
+  , graphVersion         = '2.10' // default to the oldest version
   , oauthDialogUrl       = "https://www.facebook.com/v2.0/dialog/oauth?" // oldest version for auth
   , oauthDialogUrlMobile = "https://m.facebook.com/v2.0/dialog/oauth?"   // oldest version for auth
   , requestOptions       = {};
@@ -60,15 +60,20 @@ function Graph(method, url, postData, callback) {
     postData  = {};
   }
 
+  let httpMethod = method;
+
   url           = this.prepareUrl(url);
   this.callback = callback || noop;
   this.postData = postData;
 
   this.options          = extend({}, requestOptions);
   this.options.encoding = this.options.encoding || 'utf-8';
 
+  if(httpMethod==="MULTIPART")
+    httpMethod = "POST";
+
   // these particular set of options should be immutable
-  this.options.method         = method;
+  this.options.method         = httpMethod;
   this.options.uri            = url;
   this.options.followRedirect = false;
 
@@ -196,12 +201,13 @@ Graph.prototype.get = function () {
     }
 
     self.end(body);
+
   }).on('error', function(err) {
      self.callback({
           message: 'Error processing https request'
         , exception: err
       }, null);
-  });
+
 };
 
 
@@ -237,6 +243,62 @@ Graph.prototype.post = function() {
 
 };
 
+
+/**
+ * https.multipart request wrapper
+ */
+
+Graph.prototype.multipart = function() {
+
+  var self     = this
+    , postData = this.postData;
+
+  this.options.formData  = postData;
+
+  return request(this.options, function (err, res, body) {
+    if (err) {
+      self.callback({
+          message: 'Error processing https request'
+        , exception: err
+      }, null);
+
+      return;
+    }
+
+    self.end(body);
+  });
+
+};
+
+
+/**
+ * Publish to the facebook graph
+ * access token will be needed for posts
+ * Ex:
+ *
+ *    var wallPost = { message: "heyooo budday" };
+ *    graph.multipart(friendID + "/feed", wallPost, callback);
+ *
+ * @param {string} url
+ * @param {object} postData
+ * @param {function} callback
+ */
+
+exports.multipart = function (url, postData, callback) {
+
+  if (typeof url !== 'string') {
+    return callback({ message: 'Graph api url must be a string' }, null);
+  }
+
+  if (typeof postData === 'function') {
+    callback = postData;
+    postData = url.indexOf('access_token') !== -1 ? {} : {access_token: accessToken};
+  }
+
+
+  return new Graph('MULTIPART', url, postData, callback);
+};
+
 /**
  * Accepts an url an returns facebook
  * json data to the callback provided